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Click on image for the lowdown. 
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8 members (NAPCOStormTrpr, 1955 1 Series, joe apple, klhansen, GRNHydra, DBJ71SuperCustom, dt235sd, Opelika Tom),
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Mod | | | Forums66 Topics128,079 Posts1,056,286 Members48,441 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Are you sure its a TH400? I understood there was a bigger model used in motorhomes and other big light trucks called the TH475.
I'm pretty sure the transmission in my P30 is a TH475.
I've no idea how to remove the brake, but given how I plan to use it I think its a good thing.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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